using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using CrystalDecisions.CrystalReports.Engine;

namespace ReportDemo
{
    public partial class FrmMain : Form
    {
        /// <summary>
        /// 全局水晶报表对象
        /// </summary>
        ReportDocument myReport;
        /// <summary>
        /// 数据集作为水晶报表“骨架”
        /// </summary>
        DataSet1 crDataSet = new DataSet1();

        public FrmMain()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 往“骨架”塞数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FrmMain_Load(object sender, EventArgs e)
        {
            /* *说明：自增列无需另外设置值 * * * * * */

            //主表数据
            crDataSet.MainTable.AddMainTableRow("大类一");
            crDataSet.MainTable.AddMainTableRow("大类二");
            crDataSet.MainTable.AddMainTableRow("大类三");

            //子表数据
            crDataSet.SubTable.AddSubTableRow(1, "小类一");
            crDataSet.SubTable.AddSubTableRow(1, "小类二");
            crDataSet.SubTable.AddSubTableRow(2, "小类三");
            crDataSet.SubTable.AddSubTableRow(2, "小类四");
            crDataSet.SubTable.AddSubTableRow(2, "小类五");
            crDataSet.SubTable.AddSubTableRow(2, "小类六");
            crDataSet.SubTable.AddSubTableRow(3, "小类七");
            crDataSet.SubTable.AddSubTableRow(3, "小类八");
            crDataSet.SubTable.AddSubTableRow(3, "小类九");
        }
        /// <summary>
        /// “Report”按钮事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnReport_Click(object sender, EventArgs e)
        {
            myReport = new CrystalReport1();

            //只需给主报表设定数据源，无需再为子报表设定数据
            myReport.SetDataSource(crDataSet);

            crystalReportViewer1.ReportSource = myReport;
        }
        /// <summary>
        /// 窗体关闭前删除水晶报表产生的临时文件，避免过多临时文件导致“报表加载失败”
        /// </summary>
        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            base.OnFormClosing(e);

            myReport.Dispose();
        }
    }
}